Hello, jay:
I have used NOW brand with great results. It is just too difficult to sort out which ones actually have trace alkaloids; for relief, it has never been a concern for me as I used the borage seed oil for breakthrough relief and that was rarely required. I have also used Jarrow brand with good results, and trust their products. Carlson also provides quality products but they have mixed oils. Regret top of the group Schiff does not manufacture this, either.
HEALTH,
John